He's had horrible stomach aches since he was about 5, everytime he eats greasy food or milk products he gets diarrhea, and he's paranoid about traveling because of it. He's tried immodium, kaopectate, and has had numerous tests done. his doctor put him on zoloft, but all that did was make him slightly more comfortable with traveling and he had bad side affects. even when he eats other foods, his stomach starts to hurt. the only thing that i can think of is celiac disease, but i'm not sure. any ideas?